December in Ciudad Acuña averages a daily high of 18.8°C with nights around 5.5°C. Expect roughly 3.8 wet days totalling 13mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ciudad Acuña is November–March.
Based on DEL RIO INTERNATIONAL AIRPORT, TX US (6.6km), 1995–2024. 30 years of December data.